用所给词的适当形式填空
Ms Ba sometimes watches her students having fun (play) on the playground.
Go (cross) the bridge, you can see a tall tree with many flowers on it .
Children often enjoy (they) at school .
Sheep like to eat grass and (leaf).
Please (be) quiet when you are with pandas in the zoo.
We sometimes listen to some (relax) music when we're tired.
Hunan Street is a good place (have) fun..
I like elephants because they are so (beauty).
Are (thief) afraid of the police? Yes, very much.
Do you think koalas are very (friend) to people?